To speak frankly or open up; to reveal one's feelings or secrets without holding back.
彼はようやく悩みを打ち明かして、友人に助けを求めた。
He finally opened up about his troubles and asked a friend for help.
重要な会議で率直に事情を打ち明かすべきだと判断した。
We decided we should be frank and lay the facts out at the important meeting.
昔話の語り手が秘密を打ち明かす場面で、観客は息を呑んだ。
When the storyteller revealed the secret in the old tale, the audience held their breath.